Just to make it easier for people searching here; they did provide an option for cut and paste listed at the above link. > We've added experimental support for this using local storage. It can be enabled with the clipboard=storage URL parameter as follows: draw.io/?clipboard=storage
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David KingOct 26 '13 at 13:29

"Above" where? Please note that answers can be sorted in a number of different ways, so what might be "above" this answer for you won't be true later or for someone else. Better to link to the answer/post to which you're referring.
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Al E.Oct 26 '13 at 14:26